Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[pandora-kernel.git] / drivers / usb / serial / ti_usb_3410_5052.c
1 /* vi: ts=8 sw=8
2  *
3  * TI 3410/5052 USB Serial Driver
4  *
5  * Copyright (C) 2004 Texas Instruments
6  *
7  * This driver is based on the Linux io_ti driver, which is
8  *   Copyright (C) 2000-2002 Inside Out Networks
9  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * For questions or problems with this driver, contact Texas Instruments
17  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18  * Peter Berger <pberger@brimson.com>.
19  */
20
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/firmware.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/circ_buf.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "ti_usb_3410_5052.h"
40
41 /* Defines */
42
43 #define TI_DRIVER_VERSION       "v0.9"
44 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
46
47 #define TI_FIRMWARE_BUF_SIZE    16284
48
49 #define TI_WRITE_BUF_SIZE       1024
50
51 #define TI_TRANSFER_TIMEOUT     2
52
53 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
54
55 /* supported setserial flags */
56 #define TI_SET_SERIAL_FLAGS     0
57
58 /* read urb states */
59 #define TI_READ_URB_RUNNING     0
60 #define TI_READ_URB_STOPPING    1
61 #define TI_READ_URB_STOPPED     2
62
63 #define TI_EXTRA_VID_PID_COUNT  5
64
65
66 /* Structures */
67
68 struct ti_port {
69         int                     tp_is_open;
70         __u8                    tp_msr;
71         __u8                    tp_lsr;
72         __u8                    tp_shadow_mcr;
73         __u8                    tp_uart_mode;   /* 232 or 485 modes */
74         unsigned int            tp_uart_base_addr;
75         int                     tp_flags;
76         int                     tp_closing_wait;/* in .01 secs */
77         struct async_icount     tp_icount;
78         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
79         wait_queue_head_t       tp_write_wait;
80         struct ti_device        *tp_tdev;
81         struct usb_serial_port  *tp_port;
82         spinlock_t              tp_lock;
83         int                     tp_read_urb_state;
84         int                     tp_write_urb_in_use;
85         struct circ_buf         *tp_write_buf;
86 };
87
88 struct ti_device {
89         struct mutex            td_open_close_lock;
90         int                     td_open_port_count;
91         struct usb_serial       *td_serial;
92         int                     td_is_3410;
93         int                     td_urb_error;
94 };
95
96
97 /* Function Declarations */
98
99 static int ti_startup(struct usb_serial *serial);
100 static void ti_release(struct usb_serial *serial);
101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
102 static void ti_close(struct usb_serial_port *port);
103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
104                 const unsigned char *data, int count);
105 static int ti_write_room(struct tty_struct *tty);
106 static int ti_chars_in_buffer(struct tty_struct *tty);
107 static void ti_throttle(struct tty_struct *tty);
108 static void ti_unthrottle(struct tty_struct *tty);
109 static int ti_ioctl(struct tty_struct *tty, struct file *file,
110                 unsigned int cmd, unsigned long arg);
111 static void ti_set_termios(struct tty_struct *tty,
112                 struct usb_serial_port *port, struct ktermios *old_termios);
113 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
114 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
115                 unsigned int set, unsigned int clear);
116 static void ti_break(struct tty_struct *tty, int break_state);
117 static void ti_interrupt_callback(struct urb *urb);
118 static void ti_bulk_in_callback(struct urb *urb);
119 static void ti_bulk_out_callback(struct urb *urb);
120
121 static void ti_recv(struct device *dev, struct tty_struct *tty,
122         unsigned char *data, int length);
123 static void ti_send(struct ti_port *tport);
124 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
125 static int ti_get_lsr(struct ti_port *tport);
126 static int ti_get_serial_info(struct ti_port *tport,
127         struct serial_struct __user *ret_arg);
128 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
129         struct serial_struct __user *new_arg);
130 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
131
132 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
133
134 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
135 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
136
137 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
138         __u16 moduleid, __u16 value, __u8 *data, int size);
139 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
140         __u16 moduleid, __u16 value, __u8 *data, int size);
141
142 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
143         __u8 mask, __u8 byte);
144
145 static int ti_download_firmware(struct ti_device *tdev);
146
147 /* circular buffer */
148 static struct circ_buf *ti_buf_alloc(void);
149 static void ti_buf_free(struct circ_buf *cb);
150 static void ti_buf_clear(struct circ_buf *cb);
151 static int ti_buf_data_avail(struct circ_buf *cb);
152 static int ti_buf_space_avail(struct circ_buf *cb);
153 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
154 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
155
156
157 /* Data */
158
159 /* module parameters */
160 static int debug;
161 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
162 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
163 static unsigned int vendor_3410_count;
164 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
165 static unsigned int product_3410_count;
166 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
167 static unsigned int vendor_5052_count;
168 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
169 static unsigned int product_5052_count;
170
171 /* supported devices */
172 /* the array dimension is the number of default entries plus */
173 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
174 /* null entry */
175 static struct usb_device_id ti_id_table_3410[10+TI_EXTRA_VID_PID_COUNT+1] = {
176         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
177         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
178         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
179         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
180         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
181         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
182         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
183         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
184         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
185         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
186 };
187
188 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
189         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
190         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
191         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
192         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
193 };
194
195 static struct usb_device_id ti_id_table_combined[14+2*TI_EXTRA_VID_PID_COUNT+1] = {
196         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
197         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
198         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
199         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
200         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
201         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
202         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
203         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
204         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
207         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
209         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
210         { }
211 };
212
213 static struct usb_driver ti_usb_driver = {
214         .name                   = "ti_usb_3410_5052",
215         .probe                  = usb_serial_probe,
216         .disconnect             = usb_serial_disconnect,
217         .id_table               = ti_id_table_combined,
218         .no_dynamic_id =        1,
219 };
220
221 static struct usb_serial_driver ti_1port_device = {
222         .driver = {
223                 .owner          = THIS_MODULE,
224                 .name           = "ti_usb_3410_5052_1",
225         },
226         .description            = "TI USB 3410 1 port adapter",
227         .usb_driver             = &ti_usb_driver,
228         .id_table               = ti_id_table_3410,
229         .num_ports              = 1,
230         .attach                 = ti_startup,
231         .release                = ti_release,
232         .open                   = ti_open,
233         .close                  = ti_close,
234         .write                  = ti_write,
235         .write_room             = ti_write_room,
236         .chars_in_buffer        = ti_chars_in_buffer,
237         .throttle               = ti_throttle,
238         .unthrottle             = ti_unthrottle,
239         .ioctl                  = ti_ioctl,
240         .set_termios            = ti_set_termios,
241         .tiocmget               = ti_tiocmget,
242         .tiocmset               = ti_tiocmset,
243         .break_ctl              = ti_break,
244         .read_int_callback      = ti_interrupt_callback,
245         .read_bulk_callback     = ti_bulk_in_callback,
246         .write_bulk_callback    = ti_bulk_out_callback,
247 };
248
249 static struct usb_serial_driver ti_2port_device = {
250         .driver = {
251                 .owner          = THIS_MODULE,
252                 .name           = "ti_usb_3410_5052_2",
253         },
254         .description            = "TI USB 5052 2 port adapter",
255         .usb_driver             = &ti_usb_driver,
256         .id_table               = ti_id_table_5052,
257         .num_ports              = 2,
258         .attach                 = ti_startup,
259         .release                = ti_release,
260         .open                   = ti_open,
261         .close                  = ti_close,
262         .write                  = ti_write,
263         .write_room             = ti_write_room,
264         .chars_in_buffer        = ti_chars_in_buffer,
265         .throttle               = ti_throttle,
266         .unthrottle             = ti_unthrottle,
267         .ioctl                  = ti_ioctl,
268         .set_termios            = ti_set_termios,
269         .tiocmget               = ti_tiocmget,
270         .tiocmset               = ti_tiocmset,
271         .break_ctl              = ti_break,
272         .read_int_callback      = ti_interrupt_callback,
273         .read_bulk_callback     = ti_bulk_in_callback,
274         .write_bulk_callback    = ti_bulk_out_callback,
275 };
276
277
278 /* Module */
279
280 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
281 MODULE_DESCRIPTION(TI_DRIVER_DESC);
282 MODULE_VERSION(TI_DRIVER_VERSION);
283 MODULE_LICENSE("GPL");
284
285 MODULE_FIRMWARE("ti_3410.fw");
286 MODULE_FIRMWARE("ti_5052.fw");
287 MODULE_FIRMWARE("mts_cdma.fw");
288 MODULE_FIRMWARE("mts_gsm.fw");
289 MODULE_FIRMWARE("mts_edge.fw");
290
291 module_param(debug, bool, S_IRUGO | S_IWUSR);
292 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
293
294 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
295 MODULE_PARM_DESC(closing_wait,
296     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
297
298 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
299 MODULE_PARM_DESC(vendor_3410,
300                 "Vendor ids for 3410 based devices, 1-5 short integers");
301 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
302 MODULE_PARM_DESC(product_3410,
303                 "Product ids for 3410 based devices, 1-5 short integers");
304 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
305 MODULE_PARM_DESC(vendor_5052,
306                 "Vendor ids for 5052 based devices, 1-5 short integers");
307 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
308 MODULE_PARM_DESC(product_5052,
309                 "Product ids for 5052 based devices, 1-5 short integers");
310
311 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
312
313
314 /* Functions */
315
316 static int __init ti_init(void)
317 {
318         int i, j, c;
319         int ret;
320
321         /* insert extra vendor and product ids */
322         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
323         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
324         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
325                 ti_id_table_3410[j].idVendor = vendor_3410[i];
326                 ti_id_table_3410[j].idProduct = product_3410[i];
327                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
328                 ti_id_table_combined[c].idVendor = vendor_3410[i];
329                 ti_id_table_combined[c].idProduct = product_3410[i];
330                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
331         }
332         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
333         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
334                 ti_id_table_5052[j].idVendor = vendor_5052[i];
335                 ti_id_table_5052[j].idProduct = product_5052[i];
336                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
337                 ti_id_table_combined[c].idVendor = vendor_5052[i];
338                 ti_id_table_combined[c].idProduct = product_5052[i];
339                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
340         }
341
342         ret = usb_serial_register(&ti_1port_device);
343         if (ret)
344                 goto failed_1port;
345         ret = usb_serial_register(&ti_2port_device);
346         if (ret)
347                 goto failed_2port;
348
349         ret = usb_register(&ti_usb_driver);
350         if (ret)
351                 goto failed_usb;
352
353         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
354                TI_DRIVER_DESC "\n");
355
356         return 0;
357
358 failed_usb:
359         usb_serial_deregister(&ti_2port_device);
360 failed_2port:
361         usb_serial_deregister(&ti_1port_device);
362 failed_1port:
363         return ret;
364 }
365
366
367 static void __exit ti_exit(void)
368 {
369         usb_serial_deregister(&ti_1port_device);
370         usb_serial_deregister(&ti_2port_device);
371         usb_deregister(&ti_usb_driver);
372 }
373
374
375 module_init(ti_init);
376 module_exit(ti_exit);
377
378
379 static int ti_startup(struct usb_serial *serial)
380 {
381         struct ti_device *tdev;
382         struct ti_port *tport;
383         struct usb_device *dev = serial->dev;
384         int status;
385         int i;
386
387
388         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
389             __func__, le16_to_cpu(dev->descriptor.idProduct),
390             dev->descriptor.bNumConfigurations,
391             dev->actconfig->desc.bConfigurationValue);
392
393         /* create device structure */
394         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
395         if (tdev == NULL) {
396                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
397                 return -ENOMEM;
398         }
399         mutex_init(&tdev->td_open_close_lock);
400         tdev->td_serial = serial;
401         usb_set_serial_data(serial, tdev);
402
403         /* determine device type */
404         if (usb_match_id(serial->interface, ti_id_table_3410))
405                 tdev->td_is_3410 = 1;
406         dbg("%s - device type is %s", __func__,
407                                 tdev->td_is_3410 ? "3410" : "5052");
408
409         /* if we have only 1 configuration, download firmware */
410         if (dev->descriptor.bNumConfigurations == 1) {
411                 if ((status = ti_download_firmware(tdev)) != 0)
412                         goto free_tdev;
413
414                 /* 3410 must be reset, 5052 resets itself */
415                 if (tdev->td_is_3410) {
416                         msleep_interruptible(100);
417                         usb_reset_device(dev);
418                 }
419
420                 status = -ENODEV;
421                 goto free_tdev;
422         }
423
424         /* the second configuration must be set */
425         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
426                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
427                 status = status ? status : -ENODEV;
428                 goto free_tdev;
429         }
430
431         /* set up port structures */
432         for (i = 0; i < serial->num_ports; ++i) {
433                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
434                 if (tport == NULL) {
435                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
436                         status = -ENOMEM;
437                         goto free_tports;
438                 }
439                 spin_lock_init(&tport->tp_lock);
440                 tport->tp_uart_base_addr = (i == 0 ?
441                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
442                 tport->tp_closing_wait = closing_wait;
443                 init_waitqueue_head(&tport->tp_msr_wait);
444                 init_waitqueue_head(&tport->tp_write_wait);
445                 tport->tp_write_buf = ti_buf_alloc();
446                 if (tport->tp_write_buf == NULL) {
447                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
448                         kfree(tport);
449                         status = -ENOMEM;
450                         goto free_tports;
451                 }
452                 tport->tp_port = serial->port[i];
453                 tport->tp_tdev = tdev;
454                 usb_set_serial_port_data(serial->port[i], tport);
455                 tport->tp_uart_mode = 0;        /* default is RS232 */
456         }
457
458         return 0;
459
460 free_tports:
461         for (--i; i >= 0; --i) {
462                 tport = usb_get_serial_port_data(serial->port[i]);
463                 ti_buf_free(tport->tp_write_buf);
464                 kfree(tport);
465                 usb_set_serial_port_data(serial->port[i], NULL);
466         }
467 free_tdev:
468         kfree(tdev);
469         usb_set_serial_data(serial, NULL);
470         return status;
471 }
472
473
474 static void ti_release(struct usb_serial *serial)
475 {
476         int i;
477         struct ti_device *tdev = usb_get_serial_data(serial);
478         struct ti_port *tport;
479
480         dbg("%s", __func__);
481
482         for (i = 0; i < serial->num_ports; ++i) {
483                 tport = usb_get_serial_port_data(serial->port[i]);
484                 if (tport) {
485                         ti_buf_free(tport->tp_write_buf);
486                         kfree(tport);
487                 }
488         }
489
490         kfree(tdev);
491 }
492
493
494 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
495 {
496         struct ti_port *tport = usb_get_serial_port_data(port);
497         struct ti_device *tdev;
498         struct usb_device *dev;
499         struct urb *urb;
500         int port_number;
501         int status;
502         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
503                              TI_PIPE_TIMEOUT_ENABLE |
504                              (TI_TRANSFER_TIMEOUT << 2));
505
506         dbg("%s - port %d", __func__, port->number);
507
508         if (tport == NULL)
509                 return -ENODEV;
510
511         dev = port->serial->dev;
512         tdev = tport->tp_tdev;
513
514         /* only one open on any port on a device at a time */
515         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
516                 return -ERESTARTSYS;
517
518         port_number = port->number - port->serial->minor;
519
520         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
521
522         tport->tp_msr = 0;
523         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
524
525         /* start interrupt urb the first time a port is opened on this device */
526         if (tdev->td_open_port_count == 0) {
527                 dbg("%s - start interrupt in urb", __func__);
528                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
529                 if (!urb) {
530                         dev_err(&port->dev, "%s - no interrupt urb\n",
531                                                                 __func__);
532                         status = -EINVAL;
533                         goto release_lock;
534                 }
535                 urb->complete = ti_interrupt_callback;
536                 urb->context = tdev;
537                 urb->dev = dev;
538                 status = usb_submit_urb(urb, GFP_KERNEL);
539                 if (status) {
540                         dev_err(&port->dev,
541                                 "%s - submit interrupt urb failed, %d\n",
542                                         __func__, status);
543                         goto release_lock;
544                 }
545         }
546
547         if (tty)
548                 ti_set_termios(tty, port, tty->termios);
549
550         dbg("%s - sending TI_OPEN_PORT", __func__);
551         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
552                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
553         if (status) {
554                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
555                                                         __func__, status);
556                 goto unlink_int_urb;
557         }
558
559         dbg("%s - sending TI_START_PORT", __func__);
560         status = ti_command_out_sync(tdev, TI_START_PORT,
561                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
562         if (status) {
563                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
564                                                         __func__, status);
565                 goto unlink_int_urb;
566         }
567
568         dbg("%s - sending TI_PURGE_PORT", __func__);
569         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
570                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
571         if (status) {
572                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
573                                                         __func__, status);
574                 goto unlink_int_urb;
575         }
576         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
577                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
578         if (status) {
579                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
580                                                         __func__, status);
581                 goto unlink_int_urb;
582         }
583
584         /* reset the data toggle on the bulk endpoints to work around bug in
585          * host controllers where things get out of sync some times */
586         usb_clear_halt(dev, port->write_urb->pipe);
587         usb_clear_halt(dev, port->read_urb->pipe);
588
589         if (tty)
590                 ti_set_termios(tty, port, tty->termios);
591
592         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
593         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
594                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
595         if (status) {
596                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
597                                                         __func__, status);
598                 goto unlink_int_urb;
599         }
600
601         dbg("%s - sending TI_START_PORT (2)", __func__);
602         status = ti_command_out_sync(tdev, TI_START_PORT,
603                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
604         if (status) {
605                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
606                                                         __func__, status);
607                 goto unlink_int_urb;
608         }
609
610         /* start read urb */
611         dbg("%s - start read urb", __func__);
612         urb = port->read_urb;
613         if (!urb) {
614                 dev_err(&port->dev, "%s - no read urb\n", __func__);
615                 status = -EINVAL;
616                 goto unlink_int_urb;
617         }
618         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
619         urb->complete = ti_bulk_in_callback;
620         urb->context = tport;
621         urb->dev = dev;
622         status = usb_submit_urb(urb, GFP_KERNEL);
623         if (status) {
624                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
625                                                         __func__, status);
626                 goto unlink_int_urb;
627         }
628
629         tport->tp_is_open = 1;
630         ++tdev->td_open_port_count;
631
632         goto release_lock;
633
634 unlink_int_urb:
635         if (tdev->td_open_port_count == 0)
636                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
637 release_lock:
638         mutex_unlock(&tdev->td_open_close_lock);
639         dbg("%s - exit %d", __func__, status);
640         return status;
641 }
642
643
644 static void ti_close(struct usb_serial_port *port)
645 {
646         struct ti_device *tdev;
647         struct ti_port *tport;
648         int port_number;
649         int status;
650         int do_unlock;
651
652         dbg("%s - port %d", __func__, port->number);
653
654         tdev = usb_get_serial_data(port->serial);
655         tport = usb_get_serial_port_data(port);
656         if (tdev == NULL || tport == NULL)
657                 return;
658
659         tport->tp_is_open = 0;
660
661         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
662
663         usb_kill_urb(port->read_urb);
664         usb_kill_urb(port->write_urb);
665         tport->tp_write_urb_in_use = 0;
666
667         port_number = port->number - port->serial->minor;
668
669         dbg("%s - sending TI_CLOSE_PORT", __func__);
670         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
671                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
672         if (status)
673                 dev_err(&port->dev,
674                         "%s - cannot send close port command, %d\n"
675                                                         , __func__, status);
676
677         /* if mutex_lock is interrupted, continue anyway */
678         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
679         --tport->tp_tdev->td_open_port_count;
680         if (tport->tp_tdev->td_open_port_count <= 0) {
681                 /* last port is closed, shut down interrupt urb */
682                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
683                 tport->tp_tdev->td_open_port_count = 0;
684         }
685         if (do_unlock)
686                 mutex_unlock(&tdev->td_open_close_lock);
687
688         dbg("%s - exit", __func__);
689 }
690
691
692 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
693                         const unsigned char *data, int count)
694 {
695         struct ti_port *tport = usb_get_serial_port_data(port);
696         unsigned long flags;
697
698         dbg("%s - port %d", __func__, port->number);
699
700         if (count == 0) {
701                 dbg("%s - write request of 0 bytes", __func__);
702                 return 0;
703         }
704
705         if (tport == NULL || !tport->tp_is_open)
706                 return -ENODEV;
707
708         spin_lock_irqsave(&tport->tp_lock, flags);
709         count = ti_buf_put(tport->tp_write_buf, data, count);
710         spin_unlock_irqrestore(&tport->tp_lock, flags);
711
712         ti_send(tport);
713
714         return count;
715 }
716
717
718 static int ti_write_room(struct tty_struct *tty)
719 {
720         struct usb_serial_port *port = tty->driver_data;
721         struct ti_port *tport = usb_get_serial_port_data(port);
722         int room = 0;
723         unsigned long flags;
724
725         dbg("%s - port %d", __func__, port->number);
726
727         if (tport == NULL)
728                 return 0;
729
730         spin_lock_irqsave(&tport->tp_lock, flags);
731         room = ti_buf_space_avail(tport->tp_write_buf);
732         spin_unlock_irqrestore(&tport->tp_lock, flags);
733
734         dbg("%s - returns %d", __func__, room);
735         return room;
736 }
737
738
739 static int ti_chars_in_buffer(struct tty_struct *tty)
740 {
741         struct usb_serial_port *port = tty->driver_data;
742         struct ti_port *tport = usb_get_serial_port_data(port);
743         int chars = 0;
744         unsigned long flags;
745
746         dbg("%s - port %d", __func__, port->number);
747
748         if (tport == NULL)
749                 return 0;
750
751         spin_lock_irqsave(&tport->tp_lock, flags);
752         chars = ti_buf_data_avail(tport->tp_write_buf);
753         spin_unlock_irqrestore(&tport->tp_lock, flags);
754
755         dbg("%s - returns %d", __func__, chars);
756         return chars;
757 }
758
759
760 static void ti_throttle(struct tty_struct *tty)
761 {
762         struct usb_serial_port *port = tty->driver_data;
763         struct ti_port *tport = usb_get_serial_port_data(port);
764
765         dbg("%s - port %d", __func__, port->number);
766
767         if (tport == NULL)
768                 return;
769
770         if (I_IXOFF(tty) || C_CRTSCTS(tty))
771                 ti_stop_read(tport, tty);
772
773 }
774
775
776 static void ti_unthrottle(struct tty_struct *tty)
777 {
778         struct usb_serial_port *port = tty->driver_data;
779         struct ti_port *tport = usb_get_serial_port_data(port);
780         int status;
781
782         dbg("%s - port %d", __func__, port->number);
783
784         if (tport == NULL)
785                 return;
786
787         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
788                 status = ti_restart_read(tport, tty);
789                 if (status)
790                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
791                                                         __func__, status);
792         }
793 }
794
795
796 static int ti_ioctl(struct tty_struct *tty, struct file *file,
797         unsigned int cmd, unsigned long arg)
798 {
799         struct usb_serial_port *port = tty->driver_data;
800         struct ti_port *tport = usb_get_serial_port_data(port);
801         struct async_icount cnow;
802         struct async_icount cprev;
803
804         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
805
806         if (tport == NULL)
807                 return -ENODEV;
808
809         switch (cmd) {
810         case TIOCGSERIAL:
811                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
812                 return ti_get_serial_info(tport,
813                                 (struct serial_struct __user *)arg);
814         case TIOCSSERIAL:
815                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
816                 return ti_set_serial_info(tty, tport,
817                                 (struct serial_struct __user *)arg);
818         case TIOCMIWAIT:
819                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
820                 cprev = tport->tp_icount;
821                 while (1) {
822                         interruptible_sleep_on(&tport->tp_msr_wait);
823                         if (signal_pending(current))
824                                 return -ERESTARTSYS;
825                         cnow = tport->tp_icount;
826                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
827                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
828                                 return -EIO; /* no change => error */
829                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
830                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
831                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
832                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
833                                 return 0;
834                         cprev = cnow;
835                 }
836                 break;
837         case TIOCGICOUNT:
838                 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
839                                 __func__, port->number,
840                                 tport->tp_icount.rx, tport->tp_icount.tx);
841                 if (copy_to_user((void __user *)arg, &tport->tp_icount,
842                                         sizeof(tport->tp_icount)))
843                         return -EFAULT;
844                 return 0;
845         }
846         return -ENOIOCTLCMD;
847 }
848
849
850 static void ti_set_termios(struct tty_struct *tty,
851                 struct usb_serial_port *port, struct ktermios *old_termios)
852 {
853         struct ti_port *tport = usb_get_serial_port_data(port);
854         struct ti_uart_config *config;
855         tcflag_t cflag, iflag;
856         int baud;
857         int status;
858         int port_number = port->number - port->serial->minor;
859         unsigned int mcr;
860
861         dbg("%s - port %d", __func__, port->number);
862
863         cflag = tty->termios->c_cflag;
864         iflag = tty->termios->c_iflag;
865
866         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
867         dbg("%s - old clfag %08x, old iflag %08x", __func__,
868                                 old_termios->c_cflag, old_termios->c_iflag);
869
870         if (tport == NULL)
871                 return;
872
873         config = kmalloc(sizeof(*config), GFP_KERNEL);
874         if (!config) {
875                 dev_err(&port->dev, "%s - out of memory\n", __func__);
876                 return;
877         }
878
879         config->wFlags = 0;
880
881         /* these flags must be set */
882         config->wFlags |= TI_UART_ENABLE_MS_INTS;
883         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
884         config->bUartMode = (__u8)(tport->tp_uart_mode);
885
886         switch (cflag & CSIZE) {
887         case CS5:
888                     config->bDataBits = TI_UART_5_DATA_BITS;
889                     break;
890         case CS6:
891                     config->bDataBits = TI_UART_6_DATA_BITS;
892                     break;
893         case CS7:
894                     config->bDataBits = TI_UART_7_DATA_BITS;
895                     break;
896         default:
897         case CS8:
898                     config->bDataBits = TI_UART_8_DATA_BITS;
899                     break;
900         }
901
902         /* CMSPAR isn't supported by this driver */
903         tty->termios->c_cflag &= ~CMSPAR;
904
905         if (cflag & PARENB) {
906                 if (cflag & PARODD) {
907                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
908                         config->bParity = TI_UART_ODD_PARITY;
909                 } else {
910                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
911                         config->bParity = TI_UART_EVEN_PARITY;
912                 }
913         } else {
914                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
915                 config->bParity = TI_UART_NO_PARITY;
916         }
917
918         if (cflag & CSTOPB)
919                 config->bStopBits = TI_UART_2_STOP_BITS;
920         else
921                 config->bStopBits = TI_UART_1_STOP_BITS;
922
923         if (cflag & CRTSCTS) {
924                 /* RTS flow control must be off to drop RTS for baud rate B0 */
925                 if ((cflag & CBAUD) != B0)
926                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
927                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
928         } else {
929                 tty->hw_stopped = 0;
930                 ti_restart_read(tport, tty);
931         }
932
933         if (I_IXOFF(tty) || I_IXON(tty)) {
934                 config->cXon  = START_CHAR(tty);
935                 config->cXoff = STOP_CHAR(tty);
936
937                 if (I_IXOFF(tty))
938                         config->wFlags |= TI_UART_ENABLE_X_IN;
939                 else
940                         ti_restart_read(tport, tty);
941
942                 if (I_IXON(tty))
943                         config->wFlags |= TI_UART_ENABLE_X_OUT;
944         }
945
946         baud = tty_get_baud_rate(tty);
947         if (!baud)
948                 baud = 9600;
949         if (tport->tp_tdev->td_is_3410)
950                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
951         else
952                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
953
954         /* FIXME: Should calculate resulting baud here and report it back */
955         if ((cflag & CBAUD) != B0)
956                 tty_encode_baud_rate(tty, baud, baud);
957
958         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
959         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
960
961         cpu_to_be16s(&config->wBaudRate);
962         cpu_to_be16s(&config->wFlags);
963
964         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
965                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
966                 sizeof(*config));
967         if (status)
968                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
969                                         __func__, port_number, status);
970
971         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
972         mcr = tport->tp_shadow_mcr;
973         /* if baud rate is B0, clear RTS and DTR */
974         if ((cflag & CBAUD) == B0)
975                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
976         status = ti_set_mcr(tport, mcr);
977         if (status)
978                 dev_err(&port->dev,
979                         "%s - cannot set modem control on port %d, %d\n",
980                                                 __func__, port_number, status);
981
982         kfree(config);
983 }
984
985
986 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
987 {
988         struct usb_serial_port *port = tty->driver_data;
989         struct ti_port *tport = usb_get_serial_port_data(port);
990         unsigned int result;
991         unsigned int msr;
992         unsigned int mcr;
993         unsigned long flags;
994
995         dbg("%s - port %d", __func__, port->number);
996
997         if (tport == NULL)
998                 return -ENODEV;
999
1000         spin_lock_irqsave(&tport->tp_lock, flags);
1001         msr = tport->tp_msr;
1002         mcr = tport->tp_shadow_mcr;
1003         spin_unlock_irqrestore(&tport->tp_lock, flags);
1004
1005         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1006                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1007                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1008                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1009                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1010                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1011                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1012
1013         dbg("%s - 0x%04X", __func__, result);
1014
1015         return result;
1016 }
1017
1018
1019 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1020         unsigned int set, unsigned int clear)
1021 {
1022         struct usb_serial_port *port = tty->driver_data;
1023         struct ti_port *tport = usb_get_serial_port_data(port);
1024         unsigned int mcr;
1025         unsigned long flags;
1026
1027         dbg("%s - port %d", __func__, port->number);
1028
1029         if (tport == NULL)
1030                 return -ENODEV;
1031
1032         spin_lock_irqsave(&tport->tp_lock, flags);
1033         mcr = tport->tp_shadow_mcr;
1034
1035         if (set & TIOCM_RTS)
1036                 mcr |= TI_MCR_RTS;
1037         if (set & TIOCM_DTR)
1038                 mcr |= TI_MCR_DTR;
1039         if (set & TIOCM_LOOP)
1040                 mcr |= TI_MCR_LOOP;
1041
1042         if (clear & TIOCM_RTS)
1043                 mcr &= ~TI_MCR_RTS;
1044         if (clear & TIOCM_DTR)
1045                 mcr &= ~TI_MCR_DTR;
1046         if (clear & TIOCM_LOOP)
1047                 mcr &= ~TI_MCR_LOOP;
1048         spin_unlock_irqrestore(&tport->tp_lock, flags);
1049
1050         return ti_set_mcr(tport, mcr);
1051 }
1052
1053
1054 static void ti_break(struct tty_struct *tty, int break_state)
1055 {
1056         struct usb_serial_port *port = tty->driver_data;
1057         struct ti_port *tport = usb_get_serial_port_data(port);
1058         int status;
1059
1060         dbg("%s - state = %d", __func__, break_state);
1061
1062         if (tport == NULL)
1063                 return;
1064
1065         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1066
1067         status = ti_write_byte(tport->tp_tdev,
1068                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1069                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1070
1071         if (status)
1072                 dbg("%s - error setting break, %d", __func__, status);
1073 }
1074
1075
1076 static void ti_interrupt_callback(struct urb *urb)
1077 {
1078         struct ti_device *tdev = urb->context;
1079         struct usb_serial_port *port;
1080         struct usb_serial *serial = tdev->td_serial;
1081         struct ti_port *tport;
1082         struct device *dev = &urb->dev->dev;
1083         unsigned char *data = urb->transfer_buffer;
1084         int length = urb->actual_length;
1085         int port_number;
1086         int function;
1087         int status = urb->status;
1088         int retval;
1089         __u8 msr;
1090
1091         dbg("%s", __func__);
1092
1093         switch (status) {
1094         case 0:
1095                 break;
1096         case -ECONNRESET:
1097         case -ENOENT:
1098         case -ESHUTDOWN:
1099                 dbg("%s - urb shutting down, %d", __func__, status);
1100                 tdev->td_urb_error = 1;
1101                 return;
1102         default:
1103                 dev_err(dev, "%s - nonzero urb status, %d\n",
1104                         __func__, status);
1105                 tdev->td_urb_error = 1;
1106                 goto exit;
1107         }
1108
1109         if (length != 2) {
1110                 dbg("%s - bad packet size, %d", __func__, length);
1111                 goto exit;
1112         }
1113
1114         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1115                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1116                 goto exit;
1117         }
1118
1119         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1120         function = TI_GET_FUNC_FROM_CODE(data[0]);
1121
1122         dbg("%s - port_number %d, function %d, data 0x%02X",
1123                                 __func__, port_number, function, data[1]);
1124
1125         if (port_number >= serial->num_ports) {
1126                 dev_err(dev, "%s - bad port number, %d\n",
1127                                                 __func__, port_number);
1128                 goto exit;
1129         }
1130
1131         port = serial->port[port_number];
1132
1133         tport = usb_get_serial_port_data(port);
1134         if (!tport)
1135                 goto exit;
1136
1137         switch (function) {
1138         case TI_CODE_DATA_ERROR:
1139                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1140                                         __func__, port_number, data[1]);
1141                 break;
1142
1143         case TI_CODE_MODEM_STATUS:
1144                 msr = data[1];
1145                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1146                 ti_handle_new_msr(tport, msr);
1147                 break;
1148
1149         default:
1150                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1151                                                         __func__, data[1]);
1152                 break;
1153         }
1154
1155 exit:
1156         retval = usb_submit_urb(urb, GFP_ATOMIC);
1157         if (retval)
1158                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1159                         __func__, retval);
1160 }
1161
1162
1163 static void ti_bulk_in_callback(struct urb *urb)
1164 {
1165         struct ti_port *tport = urb->context;
1166         struct usb_serial_port *port = tport->tp_port;
1167         struct device *dev = &urb->dev->dev;
1168         int status = urb->status;
1169         int retval = 0;
1170         struct tty_struct *tty;
1171
1172         dbg("%s", __func__);
1173
1174         switch (status) {
1175         case 0:
1176                 break;
1177         case -ECONNRESET:
1178         case -ENOENT:
1179         case -ESHUTDOWN:
1180                 dbg("%s - urb shutting down, %d", __func__, status);
1181                 tport->tp_tdev->td_urb_error = 1;
1182                 wake_up_interruptible(&tport->tp_write_wait);
1183                 return;
1184         default:
1185                 dev_err(dev, "%s - nonzero urb status, %d\n",
1186                         __func__, status);
1187                 tport->tp_tdev->td_urb_error = 1;
1188                 wake_up_interruptible(&tport->tp_write_wait);
1189         }
1190
1191         if (status == -EPIPE)
1192                 goto exit;
1193
1194         if (status) {
1195                 dev_err(dev, "%s - stopping read!\n", __func__);
1196                 return;
1197         }
1198
1199         tty = tty_port_tty_get(&port->port);
1200         if (tty) {
1201                 if (urb->actual_length) {
1202                         usb_serial_debug_data(debug, dev, __func__,
1203                                 urb->actual_length, urb->transfer_buffer);
1204
1205                         if (!tport->tp_is_open)
1206                                 dbg("%s - port closed, dropping data",
1207                                         __func__);
1208                         else
1209                                 ti_recv(&urb->dev->dev, tty,
1210                                                 urb->transfer_buffer,
1211                                                 urb->actual_length);
1212                         spin_lock(&tport->tp_lock);
1213                         tport->tp_icount.rx += urb->actual_length;
1214                         spin_unlock(&tport->tp_lock);
1215                 }
1216                 tty_kref_put(tty);
1217         }
1218
1219 exit:
1220         /* continue to read unless stopping */
1221         spin_lock(&tport->tp_lock);
1222         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1223                 urb->dev = port->serial->dev;
1224                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1225         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1226                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1227         }
1228         spin_unlock(&tport->tp_lock);
1229         if (retval)
1230                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1231                         __func__, retval);
1232 }
1233
1234
1235 static void ti_bulk_out_callback(struct urb *urb)
1236 {
1237         struct ti_port *tport = urb->context;
1238         struct usb_serial_port *port = tport->tp_port;
1239         struct device *dev = &urb->dev->dev;
1240         int status = urb->status;
1241
1242         dbg("%s - port %d", __func__, port->number);
1243
1244         tport->tp_write_urb_in_use = 0;
1245
1246         switch (status) {
1247         case 0:
1248                 break;
1249         case -ECONNRESET:
1250         case -ENOENT:
1251         case -ESHUTDOWN:
1252                 dbg("%s - urb shutting down, %d", __func__, status);
1253                 tport->tp_tdev->td_urb_error = 1;
1254                 wake_up_interruptible(&tport->tp_write_wait);
1255                 return;
1256         default:
1257                 dev_err(dev, "%s - nonzero urb status, %d\n",
1258                         __func__, status);
1259                 tport->tp_tdev->td_urb_error = 1;
1260                 wake_up_interruptible(&tport->tp_write_wait);
1261         }
1262
1263         /* send any buffered data */
1264         ti_send(tport);
1265 }
1266
1267
1268 static void ti_recv(struct device *dev, struct tty_struct *tty,
1269         unsigned char *data, int length)
1270 {
1271         int cnt;
1272
1273         do {
1274                 cnt = tty_insert_flip_string(tty, data, length);
1275                 if (cnt < length) {
1276                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1277                                                 __func__, length - cnt);
1278                         if (cnt == 0)
1279                                 break;
1280                 }
1281                 tty_flip_buffer_push(tty);
1282                 data += cnt;
1283                 length -= cnt;
1284         } while (length > 0);
1285
1286 }
1287
1288
1289 static void ti_send(struct ti_port *tport)
1290 {
1291         int count, result;
1292         struct usb_serial_port *port = tport->tp_port;
1293         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1294         unsigned long flags;
1295
1296
1297         dbg("%s - port %d", __func__, port->number);
1298
1299         spin_lock_irqsave(&tport->tp_lock, flags);
1300
1301         if (tport->tp_write_urb_in_use)
1302                 goto unlock;
1303
1304         count = ti_buf_get(tport->tp_write_buf,
1305                                 port->write_urb->transfer_buffer,
1306                                 port->bulk_out_size);
1307
1308         if (count == 0)
1309                 goto unlock;
1310
1311         tport->tp_write_urb_in_use = 1;
1312
1313         spin_unlock_irqrestore(&tport->tp_lock, flags);
1314
1315         usb_serial_debug_data(debug, &port->dev, __func__, count,
1316                                         port->write_urb->transfer_buffer);
1317
1318         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1319                            usb_sndbulkpipe(port->serial->dev,
1320                                             port->bulk_out_endpointAddress),
1321                            port->write_urb->transfer_buffer, count,
1322                            ti_bulk_out_callback, tport);
1323
1324         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1325         if (result) {
1326                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1327                                                         __func__, result);
1328                 tport->tp_write_urb_in_use = 0;
1329                 /* TODO: reschedule ti_send */
1330         } else {
1331                 spin_lock_irqsave(&tport->tp_lock, flags);
1332                 tport->tp_icount.tx += count;
1333                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1334         }
1335
1336         /* more room in the buffer for new writes, wakeup */
1337         if (tty)
1338                 tty_wakeup(tty);
1339         tty_kref_put(tty);
1340         wake_up_interruptible(&tport->tp_write_wait);
1341         return;
1342 unlock:
1343         spin_unlock_irqrestore(&tport->tp_lock, flags);
1344         tty_kref_put(tty);
1345         return;
1346 }
1347
1348
1349 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1350 {
1351         unsigned long flags;
1352         int status;
1353
1354         status = ti_write_byte(tport->tp_tdev,
1355                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1356                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1357
1358         spin_lock_irqsave(&tport->tp_lock, flags);
1359         if (!status)
1360                 tport->tp_shadow_mcr = mcr;
1361         spin_unlock_irqrestore(&tport->tp_lock, flags);
1362
1363         return status;
1364 }
1365
1366
1367 static int ti_get_lsr(struct ti_port *tport)
1368 {
1369         int size, status;
1370         struct ti_device *tdev = tport->tp_tdev;
1371         struct usb_serial_port *port = tport->tp_port;
1372         int port_number = port->number - port->serial->minor;
1373         struct ti_port_status *data;
1374
1375         dbg("%s - port %d", __func__, port->number);
1376
1377         size = sizeof(struct ti_port_status);
1378         data = kmalloc(size, GFP_KERNEL);
1379         if (!data) {
1380                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1381                 return -ENOMEM;
1382         }
1383
1384         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1385                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1386         if (status) {
1387                 dev_err(&port->dev,
1388                         "%s - get port status command failed, %d\n",
1389                                                         __func__, status);
1390                 goto free_data;
1391         }
1392
1393         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1394
1395         tport->tp_lsr = data->bLSR;
1396
1397 free_data:
1398         kfree(data);
1399         return status;
1400 }
1401
1402
1403 static int ti_get_serial_info(struct ti_port *tport,
1404         struct serial_struct __user *ret_arg)
1405 {
1406         struct usb_serial_port *port = tport->tp_port;
1407         struct serial_struct ret_serial;
1408
1409         if (!ret_arg)
1410                 return -EFAULT;
1411
1412         memset(&ret_serial, 0, sizeof(ret_serial));
1413
1414         ret_serial.type = PORT_16550A;
1415         ret_serial.line = port->serial->minor;
1416         ret_serial.port = port->number - port->serial->minor;
1417         ret_serial.flags = tport->tp_flags;
1418         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1419         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1420         ret_serial.closing_wait = tport->tp_closing_wait;
1421
1422         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1423                 return -EFAULT;
1424
1425         return 0;
1426 }
1427
1428
1429 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1430         struct serial_struct __user *new_arg)
1431 {
1432         struct serial_struct new_serial;
1433
1434         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1435                 return -EFAULT;
1436
1437         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1438         tport->tp_closing_wait = new_serial.closing_wait;
1439
1440         return 0;
1441 }
1442
1443
1444 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1445 {
1446         struct async_icount *icount;
1447         struct tty_struct *tty;
1448         unsigned long flags;
1449
1450         dbg("%s - msr 0x%02X", __func__, msr);
1451
1452         if (msr & TI_MSR_DELTA_MASK) {
1453                 spin_lock_irqsave(&tport->tp_lock, flags);
1454                 icount = &tport->tp_icount;
1455                 if (msr & TI_MSR_DELTA_CTS)
1456                         icount->cts++;
1457                 if (msr & TI_MSR_DELTA_DSR)
1458                         icount->dsr++;
1459                 if (msr & TI_MSR_DELTA_CD)
1460                         icount->dcd++;
1461                 if (msr & TI_MSR_DELTA_RI)
1462                         icount->rng++;
1463                 wake_up_interruptible(&tport->tp_msr_wait);
1464                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1465         }
1466
1467         tport->tp_msr = msr & TI_MSR_MASK;
1468
1469         /* handle CTS flow control */
1470         tty = tty_port_tty_get(&tport->tp_port->port);
1471         if (tty && C_CRTSCTS(tty)) {
1472                 if (msr & TI_MSR_CTS) {
1473                         tty->hw_stopped = 0;
1474                         tty_wakeup(tty);
1475                 } else {
1476                         tty->hw_stopped = 1;
1477                 }
1478         }
1479         tty_kref_put(tty);
1480 }
1481
1482
1483 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1484 {
1485         struct ti_device *tdev = tport->tp_tdev;
1486         struct usb_serial_port *port = tport->tp_port;
1487         wait_queue_t wait;
1488
1489         dbg("%s - port %d", __func__, port->number);
1490
1491         spin_lock_irq(&tport->tp_lock);
1492
1493         /* wait for data to drain from the buffer */
1494         tdev->td_urb_error = 0;
1495         init_waitqueue_entry(&wait, current);
1496         add_wait_queue(&tport->tp_write_wait, &wait);
1497         for (;;) {
1498                 set_current_state(TASK_INTERRUPTIBLE);
1499                 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1500                 || timeout == 0 || signal_pending(current)
1501                 || tdev->td_urb_error
1502                 || port->serial->disconnected)  /* disconnect */
1503                         break;
1504                 spin_unlock_irq(&tport->tp_lock);
1505                 timeout = schedule_timeout(timeout);
1506                 spin_lock_irq(&tport->tp_lock);
1507         }
1508         set_current_state(TASK_RUNNING);
1509         remove_wait_queue(&tport->tp_write_wait, &wait);
1510
1511         /* flush any remaining data in the buffer */
1512         if (flush)
1513                 ti_buf_clear(tport->tp_write_buf);
1514
1515         spin_unlock_irq(&tport->tp_lock);
1516
1517         mutex_lock(&port->serial->disc_mutex);
1518         /* wait for data to drain from the device */
1519         /* wait for empty tx register, plus 20 ms */
1520         timeout += jiffies;
1521         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1522         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1523         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1524         && !port->serial->disconnected) {
1525                 if (ti_get_lsr(tport))
1526                         break;
1527                 mutex_unlock(&port->serial->disc_mutex);
1528                 msleep_interruptible(20);
1529                 mutex_lock(&port->serial->disc_mutex);
1530         }
1531         mutex_unlock(&port->serial->disc_mutex);
1532 }
1533
1534
1535 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1536 {
1537         unsigned long flags;
1538
1539         spin_lock_irqsave(&tport->tp_lock, flags);
1540
1541         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1542                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1543
1544         spin_unlock_irqrestore(&tport->tp_lock, flags);
1545 }
1546
1547
1548 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1549 {
1550         struct urb *urb;
1551         int status = 0;
1552         unsigned long flags;
1553
1554         spin_lock_irqsave(&tport->tp_lock, flags);
1555
1556         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1557                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1558                 urb = tport->tp_port->read_urb;
1559                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1560                 urb->complete = ti_bulk_in_callback;
1561                 urb->context = tport;
1562                 urb->dev = tport->tp_port->serial->dev;
1563                 status = usb_submit_urb(urb, GFP_KERNEL);
1564         } else  {
1565                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1566                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1567         }
1568
1569         return status;
1570 }
1571
1572
1573 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1574         __u16 moduleid, __u16 value, __u8 *data, int size)
1575 {
1576         int status;
1577
1578         status = usb_control_msg(tdev->td_serial->dev,
1579                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1580                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1581                 value, moduleid, data, size, 1000);
1582
1583         if (status == size)
1584                 status = 0;
1585
1586         if (status > 0)
1587                 status = -ECOMM;
1588
1589         return status;
1590 }
1591
1592
1593 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1594         __u16 moduleid, __u16 value, __u8 *data, int size)
1595 {
1596         int status;
1597
1598         status = usb_control_msg(tdev->td_serial->dev,
1599                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1600                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1601                 value, moduleid, data, size, 1000);
1602
1603         if (status == size)
1604                 status = 0;
1605
1606         if (status > 0)
1607                 status = -ECOMM;
1608
1609         return status;
1610 }
1611
1612
1613 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1614         __u8 mask, __u8 byte)
1615 {
1616         int status;
1617         unsigned int size;
1618         struct ti_write_data_bytes *data;
1619         struct device *dev = &tdev->td_serial->dev->dev;
1620
1621         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1622                                         __func__, addr, mask, byte);
1623
1624         size = sizeof(struct ti_write_data_bytes) + 2;
1625         data = kmalloc(size, GFP_KERNEL);
1626         if (!data) {
1627                 dev_err(dev, "%s - out of memory\n", __func__);
1628                 return -ENOMEM;
1629         }
1630
1631         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1632         data->bDataType = TI_RW_DATA_BYTE;
1633         data->bDataCounter = 1;
1634         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1635         data->wBaseAddrLo = cpu_to_be16(addr);
1636         data->bData[0] = mask;
1637         data->bData[1] = byte;
1638
1639         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1640                 (__u8 *)data, size);
1641
1642         if (status < 0)
1643                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1644
1645         kfree(data);
1646
1647         return status;
1648 }
1649
1650 static int ti_do_download(struct usb_device *dev, int pipe,
1651                                                 u8 *buffer, int size)
1652 {
1653         int pos;
1654         u8 cs = 0;
1655         int done;
1656         struct ti_firmware_header *header;
1657         int status = 0;
1658         int len;
1659
1660         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1661                 cs = (__u8)(cs + buffer[pos]);
1662
1663         header = (struct ti_firmware_header *)buffer;
1664         header->wLength = cpu_to_le16((__u16)(size
1665                                         - sizeof(struct ti_firmware_header)));
1666         header->bCheckSum = cs;
1667
1668         dbg("%s - downloading firmware", __func__);
1669         for (pos = 0; pos < size; pos += done) {
1670                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1671                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1672                                                                 &done, 1000);
1673                 if (status)
1674                         break;
1675         }
1676         return status;
1677 }
1678
1679 static int ti_download_firmware(struct ti_device *tdev)
1680 {
1681         int status;
1682         int buffer_size;
1683         __u8 *buffer;
1684         struct usb_device *dev = tdev->td_serial->dev;
1685         unsigned int pipe = usb_sndbulkpipe(dev,
1686                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1687         const struct firmware *fw_p;
1688         char buf[32];
1689
1690         /* try ID specific firmware first, then try generic firmware */
1691         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1692             dev->descriptor.idProduct);
1693         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1694                 buf[0] = '\0';
1695                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1696                         switch (dev->descriptor.idProduct) {
1697                         case MTS_CDMA_PRODUCT_ID:
1698                                 strcpy(buf, "mts_cdma.fw");
1699                                 break;
1700                         case MTS_GSM_PRODUCT_ID:
1701                                 strcpy(buf, "mts_gsm.fw");
1702                                 break;
1703                         case MTS_EDGE_PRODUCT_ID:
1704                                 strcpy(buf, "mts_edge.fw");
1705                                 break;
1706                         }
1707                 }
1708                 if (buf[0] == '\0') {
1709                         if (tdev->td_is_3410)
1710                                 strcpy(buf, "ti_3410.fw");
1711                         else
1712                                 strcpy(buf, "ti_5052.fw");
1713                 }
1714                 status = request_firmware(&fw_p, buf, &dev->dev);
1715         }
1716         if (status) {
1717                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1718                 return -ENOENT;
1719         }
1720         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1721                 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1722                 return -ENOENT;
1723         }
1724
1725         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1726         buffer = kmalloc(buffer_size, GFP_KERNEL);
1727         if (buffer) {
1728                 memcpy(buffer, fw_p->data, fw_p->size);
1729                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1730                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1731                 kfree(buffer);
1732         } else {
1733                 status = -ENOMEM;
1734         }
1735         release_firmware(fw_p);
1736         if (status) {
1737                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1738                                                         __func__, status);
1739                 return status;
1740         }
1741
1742         dbg("%s - download successful", __func__);
1743
1744         return 0;
1745 }
1746
1747
1748 /* Circular Buffer Functions */
1749
1750 /*
1751  * ti_buf_alloc
1752  *
1753  * Allocate a circular buffer and all associated memory.
1754  */
1755
1756 static struct circ_buf *ti_buf_alloc(void)
1757 {
1758         struct circ_buf *cb;
1759
1760         cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1761         if (cb == NULL)
1762                 return NULL;
1763
1764         cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1765         if (cb->buf == NULL) {
1766                 kfree(cb);
1767                 return NULL;
1768         }
1769
1770         ti_buf_clear(cb);
1771
1772         return cb;
1773 }
1774
1775
1776 /*
1777  * ti_buf_free
1778  *
1779  * Free the buffer and all associated memory.
1780  */
1781
1782 static void ti_buf_free(struct circ_buf *cb)
1783 {
1784         kfree(cb->buf);
1785         kfree(cb);
1786 }
1787
1788
1789 /*
1790  * ti_buf_clear
1791  *
1792  * Clear out all data in the circular buffer.
1793  */
1794
1795 static void ti_buf_clear(struct circ_buf *cb)
1796 {
1797         cb->head = cb->tail = 0;
1798 }
1799
1800
1801 /*
1802  * ti_buf_data_avail
1803  *
1804  * Return the number of bytes of data available in the circular
1805  * buffer.
1806  */
1807
1808 static int ti_buf_data_avail(struct circ_buf *cb)
1809 {
1810         return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1811 }
1812
1813
1814 /*
1815  * ti_buf_space_avail
1816  *
1817  * Return the number of bytes of space available in the circular
1818  * buffer.
1819  */
1820
1821 static int ti_buf_space_avail(struct circ_buf *cb)
1822 {
1823         return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1824 }
1825
1826
1827 /*
1828  * ti_buf_put
1829  *
1830  * Copy data data from a user buffer and put it into the circular buffer.
1831  * Restrict to the amount of space available.
1832  *
1833  * Return the number of bytes copied.
1834  */
1835
1836 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1837 {
1838         int c, ret = 0;
1839
1840         while (1) {
1841                 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1842                 if (count < c)
1843                         c = count;
1844                 if (c <= 0)
1845                         break;
1846                 memcpy(cb->buf + cb->head, buf, c);
1847                 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1848                 buf += c;
1849                 count -= c;
1850                 ret += c;
1851         }
1852
1853         return ret;
1854 }
1855
1856
1857 /*
1858  * ti_buf_get
1859  *
1860  * Get data from the circular buffer and copy to the given buffer.
1861  * Restrict to the amount of data available.
1862  *
1863  * Return the number of bytes copied.
1864  */
1865
1866 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1867 {
1868         int c, ret = 0;
1869
1870         while (1) {
1871                 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1872                 if (count < c)
1873                         c = count;
1874                 if (c <= 0)
1875                         break;
1876                 memcpy(buf, cb->buf + cb->tail, c);
1877                 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1878                 buf += c;
1879                 count -= c;
1880                 ret += c;
1881         }
1882
1883         return ret;
1884 }